Small
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2025
·
IF 12.1
Yuxin Xue,Qiong Lin,Xiangfeng Sun,Dongxia Li,Yulin Fu,Zhiqi Li,Yuanhao Shi,Chongxian Luo,Xuefeng Gui,Kai Xu
The resurgence of lithium metal batteries (LMBs) necessitates advancements in electrolyte engineering to regulate ion transport and manipulate interfacial characteristics. Noteworthy strategies encompass the development of high-efficiency lithium-ion conductors for quasi-solid-state composite electrolytes. In this context, two crystalline 3D COFs are presented that are thoughtfully designed by selecting decasilsesquioxane (T 10 ) cage building blocks and linear linkers to open up efficient ion-conducting pathways. The cage silsesquioxane-knotted COFs (CSQ-COFs) feature densely interconnected pore channels and a multimodal pore size distribution, which gives them the potential to function as ionic conductors. In addition, the dissociation of electrolyte salts by the silsesquioxane framework, along with the strong adsorption of anions, synergistically enhances ion transport. The coin cell assembled with CSQ-COF displays an ionic conductivity of 0.727 mS cm −1 at 80 °C, an E a of 0.12 eV, and t Li+ of 0.83. Therefore, Li symmetrical cell demonstrates excellent Li plating/stripping behaviors for 600 h under 0.5 mA cm −2 . The Li/LiFePO 4 cell containing the CSQ-COF solid-state electrolyte delivers an initial discharge capacity of ≈159.6 mAh g −1 at a rate of 0.5 C at room temperature with excellent capacity retention after 150 cycles. This work provides a novel insight on the development of 3D COF ionic conductors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yingying Wang,Taipeng Jiang,Shangmin Si,Jian Wu,Lan He,Weijie Wei,Lingling Zeng,Sheng Chen,Meng Li,Zhuwei Gao
Photothermal materials have attracted considerable attention for efficient solar energy conversion. A promising strategy involves leveraging the photothermal effect to reduce crude oil viscosity, thereby facilitating efficient oil–water separation. In this study, we reported the in-situ polymerization of covalent organic framework (COF) layers on cotton wool (CW). Subsequently, polydopamine (PDA) and polydimethylsiloxane (PDMS) were sequentially coated to obtain a novel sandwich-structured composite (PDMS@PDA@COF@CW). The composite exhibited excellent superhydrophobic properties with a water contact angle of 153.5°. Furthermore, it maintained an oil–water separation efficiency of 98.1 % even after 50 consecutive cycles. The material also demonstrated remarkable chemical stability under various harsh environmental conditions and possessed excellent flame retardancy. Critically, the synergistic interaction between the PDA coating and the COF framework significantly enhanced photothermal performance. Consequently, the surface temperature of PDMS@PDA@COF@CW rapidly reached 83.8 °C within 180 s under 1.0 kW/m 2 light irradiation. This study presents a highly promising solution for mitigating crude oil spills, offering valuable insights into the design of multifunctional materials for environmental remediation.
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
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2023
·Vol. 34
·期 37
·375402
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IF 3.5
Yingming Wang,Mingkai Li,Tianzhuo Wen,Guoxian Gu
The design and construction of three-dimensional covalent organic frameworks (3D COF) remains a major challenge, and it is necessary to explore new strategies to synthesize 3D COF with ideal structure. Here, we utilize two-dimensional covalent organic framework (2D COF) with allyl side chain to achieve interlayer crosslinking through olefin metathesis reaction, thereby constructing a 3D COF with cage-like structures. This new material named CAGE-COF has larger specific surface area and more open pore structure than the original 2D COF. The cathode material with CAGE-COF retained 78.7% of its initial capacity after 500 cycles, and the fading rate is 0.04% each cycle.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2020
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IF 3.594
Juping Liu,Huawei Zhang,Shijuan Zhang,Wenwen Wang,Jinmao You
A new three-dimensional(3D) covalent organic framework (COF) was designed and synthesized. It showed excellent fluorescence property and good fluorescence response for water. The fluorescence property decreased with the addition of water, and it showed good linearity in the water concentration range of 0.1–1.5 wt% with R 2 of 0.9988. The detection limit of water in acetonitrile was 0.036 wt%. It also showed good adsorption performance for polychlorinated biphenyls (PCBs), and the extraction performance of PCBs from water samples was evaluated GC–MS/MS. The optimized conditions were pH 7; adsorbent amount, 20 mg; eluent, 1.0 mL hexane; desorption time, 5 min. The obtained recoveries were in the range of 90.9%–101.3%. The limits of detection and limits of quantitation for PCBs were in the range of 0.56–2.81 ng/L and 2.0–8.7 ng/L, respectively. This is the first report of COFs which showed both excellent fluorescence and adsorption performance.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2020
·
IF 4.192
Shijuan Zhang,Xia Wu,Chong Ma,Yanxin Li,Jinmao You
Hexadecyl trimethylammonium bromide (CTAB) micelles were applied in the synthesis of covalent organic frameworks (COFs) for the first time to achieve the synthesis of 3D COF from 2D materials. Benzidine, one raw material for COF, was enclosed in the CTAB micelles because of the hydrophobic effect, and thus the target COF, which can be formed immediately with the aid of p-toluenesulfonic acid, grew in a micelle guided 3D form. The synthesized 3D COF showed a flower-like structure, whereas the COF synthesized without CTAB showed a smooth structure. The diameter of the 3D COFs showed direct correlations with CTAB concentrations. Moreover, the CTAB modified COF also showed a dramatically improved fluorescence property in comparison with that of normal COFs. The synthesized 3D COF showed good adsorption performance for UV filters and alkylphenols with recoveries ranged from 90.2% to 99.8%, and it also showed good fluorescence response for Pb2+. The utility of CTAB modified COF was verified in the enrichment of UV filters and alkylphenols from food packaging material migrants.
研究领域:
材料科学
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环境科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2025
·
IF 4.6
Zirong Lan,Jin Huang,Jiang Qing,Jianhua Shi,Zhou Xu,Maolong Chen,Li Wen,Yunhui Cheng,Libing Wang,Li Ding
By precisely regulating ionic liquids (ILs) as dual functional mediators (green solvents/pore structure directing agents), we have achieved synthesis of three-dimensional hierarchical porous covalent organic frameworks (3D-COF). The prepared IL@3D-COF exhibited a multiscale nanopores structure and larger specific surface area, which was used as the solid-phase microextraction (SPME) coating material for the dual-mode SPME of polycyclic aromatic hydrocarbons (PAHs) from thermal processed meats. Especially, the incorporation of ILs functional groups provided abundant active adsorption sites, while the unique hierarchical pore architecture of IL@3D-COF significantly enhanced mass transfer kinetics. Under the accelerated extraction of high mass transfer rate and multiple interactions (π-π stacking, hydrogen bonding, and hydrophobic interactions), extraction equilibrium can be achieved in just 8 min. When combined with gas chromatography tandem mass spectrometry (GC-MS/MS), the 16 PAHs in meat samples have wide linear range (0.2-500 μg kg -1 ) with low quantitative limits of 0.02-0.78 μg kg -1 . Compared with other coating materials, IL@3D-COF coating materials are not only efficient and time-saving in the extraction process, with excellent extraction effects, but also have mild synthesis conditions and are environmentally friendly. It can provide a new alternative for sensitive analysis of PAHs in thermal processed meat products.
研究领域:
分析化学
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食品科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Wenxiu Zhou,Bingjie Li,Ke Xu,Shengman Zhang,Zhaoqian Li,Xin Wang
The residues of antiviral drugs acyclovir (ACV), penciclovir (PCV) and ganciclovir (GCV) in foods, particularly in ready-to-eat products, pose a significant threat to human health, making it urgent to develop a rapid and sensitive method for their detection. Herein, we designed a novel magnetic molecularly imprinted three-dimensional covalent organic framework (MICOF@Fe 3 O 4 ) for selective extraction of these antiviral drugs from complicated food matrix. The prepared MICOF@Fe 3 O 4 integrates molecular recognition ability, 3D COF structural advantages and magnetic responsiveness, providing high selectivity, large adsorption capacity and facile operation for magnetic solid-phase extraction (MSPE). Afterwards, a MSPE-UHPLC-MS/MS method was developed, which stands out as the most sensitive approach yet for ACV, PCV, GCV measurements and has been successfully applied to analyze thirteen ready-to-eat chicken samples. Endogenous PCV was detected in two of these samples, demonstrating the potential of the proposed method as a valuable tool for monitoring antiviral drug residues and ensuring food safety.
研究领域:
分析化学
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食品安全
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材料科学
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药物分析
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）